Spark-discharging device for electric lighting for gas-burners.



UNITED STATES PATENT QFFICE.

PAUL HOFFMANN', OFCHARLOTTENBURG, GERMANY.

SPARK-DlSCHARGlllG DEVICE FOR ELECTRIC LIGHTING FOR GAS-BURNERS.

. SPECIFICATION forming part of Letters Patent No. 673,713, dated May'7, 1901. Application filed March 24,1900. Serial No. 10,076. (No model.)

In the accompanying drawings, Figure 1,

shows a front view, and Fig. 2 a side view, of my new spark-discharging device attached to a gas-burner. Fig. 3 shows a side view of a modified form of the said device, and Fig. 4 represents the insulation of the spark-discharging device from the metal parts of the burner.

The said device consists of a small piece or stick of metal a, which may be made of sheetiron, stiff wire, or the like. of metal a projects with its upper portion across the edge of the burner-head, while itslower portion,connected with the current-conducting wire I), is hooked under the burnergallery. In the arrangement shown in Figs. land 2 the metal piece or stick a, itself is bent "hook-like on its lower end in such a manner that a holdfast-hook cis formed on the same, by which the metal piece a is clamped or fixed to the bottom of the burner-gallery, thus offecting the attachment of the device to the burner without any further fastening means.

Instead of being made in one piece with the stick a the holdfast-hook a may be fixed separately to the latter. Near the upper end the stick a may be provided with two side arms 01, by means of which it leans against the burner-head. These two arms, however, may be dispensed with. The upper end of the piece a, which projects across the edge of the burner-head, is pointed in any well-known manner, and from this point of the piece a the sparksj ump over to the opposite wire it, which is conductably connected to the burner-head. (See Fig. 4.) Hereby the lighting or ignition The said piece of the gas escaping from the burner-head will be effected. V

In the modification shown in Fig. 8 the metal piece a is provided with a special hook g of any ordinary kind, connected with the metal piece by means of a helical spring fand hooked under the burner-gallery. By means of the springf the upper slightly-bent end of the stick a will be clamped or pressed against the edgeof the burner-head, and thereby the device firmly fixed to the burner. seen from the drawings, in both modes of construction the device can be easily applied to or detached from the burner-head. The necessary insulation of the spark-discharging device against the metal parts of the burnerhead may be efiected in any manner by interposing soineinsulating materialfor in stance, a small'piece of mica. It proves very advantageous, too, to mount a cap 'iof soap stone upon the burner-head, which permanently rests upon the latter, as shown in Fig. 4, thuseifecting the insulation at the upper end of the spark-discharging device. The insulation at the lower end of the hook a will be effected, preferably, by an interposed layer j of any insulating material, which is to be fastened permanently within the hook c or at the respective portion ofthe burner-gallery.

Instead of lighting or igniting the gas by means of electric sparks 'it could be efiected in another manner without leaving the nature of the above-described invention. For in stance, the metal stick a may be provided at the top with a platinum wire, which is to be made incandescent by the electric current.

As will be with the current-conducting line and project- 1 with an integral hook adapted to be sprung v ing with its upper portion across the edge of i'nto engagement with the gallery, substan the burner-head and a holdfast-hook situated tially as described. at the lower portion of the metal piece or stick In witness whereof I have hereunto set my I 5 and stiffly connected with the latter, substanhand in presence of two witnesses.

tially as described and for .the purpose set I I PAUL HOFFM forth. p 3. In combination with abnrner, a current-' Witnesses:,

conducting piece having its'upper end over- 2 WOLDEMAR HAUPT,

IO lappingtheburner and its lower end provided HENRY HASPER, 

